# +
print(1+1)
print(1+1.1) # 有浮点数结果是浮点数
# -
print(1-1)
print(1-0.5)
print(1-2)
# *
print(2*0.5)
# / 不管有没有浮点数，运算的结果是浮点数
print(3/2)
#  //
print(9//4)
# %
print(9%4)
# **
print(2**3)
# ()
print(1+2*3)
print((1+2)*2)